Machine for sewing on buttons.



- 'Patented oct. 9, |900. F, T. L ||.|cH. y MACHINE FOR SEWING 0N BUT'IONS.

(Application led Oct. 20, 1899.)

5 sheets-sheet 2.

(No Model.)

INVENTOR. l a@ TMf/ www.

ATTORNEK WITNESS/55 QW Q, OM-

No. 659,537. f Patented Oct. 9., 1900.

' F. T. LEILICH.

MACHINE FOR SEWING 0Nl BUTTONS.

(Application filed Oct 20, 1899.)

5 Sheets-Shed I.

No Model.)

JNVENIOR.

BY Mww/@M ATTORNEY.

l NESSES QW a AUM No. 659,537. Patented oct. 9, |900.

F. T. LElLlcH.

'MACHINE FORSEWING 0N BUTTONS.

(Application led Oct. 20, 1899.) @No Model.) l5 She'ets-Sheet 3.

m: wams 1s-mu :0. nnorsuma.. mums-rom n. c.

No. 659,537. Patented Oct. 9, |900.

F. T. LEILICH.

MACHINE FOR SEWING'UN BUTTONS.

(Application led Oct. 20, 1899.) l

(No Model.) 5 Sheets-Sheet 4.

WITNESSES [N VEN T-R.

" BY u ff/af ,a

y m /O/Ww L ,mmc/ f A ATTORNEY.

1n: Nonms rentas co. Pnorauwo.. wnsnmmon, u. c.

Patented oct. 9, 1900; F. T. LElLlcH.

MACHINE FDR SEWING 0N BUTTONS.

(Application led Oct. 20, 1899.)

5 Sheets-Sheet 5 .f

(No Model.)

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FRANCIS T. LEILICH, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO 'IH CLIMAX MANUFACTURING COMPANY, OF SAME PLACE.`

MACHINE FOR SEWING ON BUTTONS.

SPECIFICATION forming part of Letters Patent No. 659,537. dated October 9, 1900.

' Appnanonnedocaberzo,1899. sentinmsezsv. momma.)

lro tZZ whom, it 1v1/tty con/cern,.-

Be it known that I, FRANCIS T. LEILIoH, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Button-Sewing Machines, of which the following is a specication.

This invention relates to improvements in io button-sewing machines; and the objects of the invention are, rst, to provide means for shifting the button-clamp, so that after a predetermined number of stitches have been -made through one pair of eyes of a button I5 with four eyes the stitching may be commenced through the other pair, and which may be adjusted for a button with two eyes so that the button-clamp is held in a stationary central position; secondly, to provide zo means for varying the number of stitches to be made through each pair of eyes; thirdly, to provide means for automatically stopping the machine after a predetermined number of stitches have been made, and, fourthly, to z5 simplify the constructions, so as to render the various adjustments simple, readily accessible, and easily eiected by an unskilled operat-or.

In the drawings, Figure l is a front elevation of a button-sewing machine constructed -in accordance with this invention. Fig. 2 is a rear elevation of the same. Fig. 3 is an enlarged plan view of the arm and driving mechanism of the machine, the frame being cut away in parts to showl the mechanism in its interior. Figs. 4, 5, and 6 are elevations of the cam-wheel and cam-roller arm in various positions. Fig. 7 is a side view, partly in section, of the same. Fig. S is a side ele- .',o vation of the cam-wheel and bracket detached Fig. 9 is a detail showing the position of the parts in sewing on a button having only two eyes. Fig. l() is an enlarged plan View of the button-clamp mechanism. Fig. ll is l5 a side elevation, partly in section, of the same. Fig. l2 is a horizontal detail section lo show the slots in the clamp slides. Fig. 13 is a vertical section to show the same. Fig.

14 is a horizontal detail section to show the mechanism 'for operating the third jaw.

The hollow arm l of the machine is inV general form of the usual construction and carries within it the main driving-shaft 7c., which by a mechanism common to this class of machines reciprocates the needle to make the stitches. From said'driving-shaft there is actuated mechanism for shifting the needle from one eye of a button to another to sew the button onto the cloth, and such mechanism is as follows: Said driving-shaft has 6o mounted thereon a miter-wheel 3, meshing with a miter-wheel 4 on a stud 5, extending inwardly from a cover-plate 6, said wheel 4 driving, by means of a pinion 7, a gearvE), formed on a cam-Wheel l, revolving on a stud 7l. 65 Said cam-wheel has in its front face the camgroove 12, having high and low dwells connected by two inclines 13, and in said groove rides the roller fm, mounted on a stud 14, eX- tending through the plate 6, said plate having 7o an aperture elongatedv radially from the center of the cam-wheel to permit the movement to and from said center of the roller fm, as it rides up and down the inclines 13 in the cam-groove. Said stud 14 is carried by a bell-crank lever 75 n, pivoted at o in the frame of the machine, another arm of said lever being connected by a link p with an arm 72 of the horizontallyswinging carrier 73 ot' the needle-bar 74 to vibrate the same. The connection of the link 8o p with the bell-crank lever n is made by means of a flat-headed screw- 75, passing through the end of said link, the head 76 of which may be moved in a T-slot 77, formedin said lever n in an arc of a' circle having the link p for 85 radius, and said head may be clamped at any point byaset-nut 78 on the projecting threaded end of said screw. As the cam-wheel revolves the needle is shifted from one position in which it can penetrate one eye of the but- 9o ton to another position in which it can penetrate the other eye, the button having been held stationary in the meantime, and by reason of the adjustabilityof the end of the link je over the T-slot 77a greater or less distance 95 from the pivot o the amount of shift may be varied, as desired, to suit different distances between the eye of the button. The luiterwheel 3 is adjustably secured on the drivingshaft k by means of the screw 7.93. (Shown roo in Fig. 3.) By this means the parts may be so assembled that the lateral shifting ot' the needle-bar may be timed to take place while the needle is out of the bu tten-eye. The gear 9 is of four times the .diameter of the pinion 7, and as the cam-wheel Z thus makes one revolution for every four revolutions of the main driving-shaft-that is, for every four stitches ma'de by the needle-it follows that this shifting of the needle from one eye of the button to the other takes place after every two stitches and a return is made to the first eye after the next two stitches. By this construction a double-hitch stitch may be made by which a double loop or twist is given to the under thread, so that there is formed what is, in effect, a knot, preventing unraveling of the thread.

The mechanism for shifting the button to present to the needle the remaining two ofthe four eyes of the button is as follows: Upon the bell-crank lever n is also formed a second T- slot 79, in which there is secured adj ustably,in like manner as the end of the link 19 in the T-slot 77, the end of a link 35, the outer end of whichis pivotally connected to a crank 80 on a rock-shaft 36. Said rock-shaft 36 extends from the front to the rear of the machine and is journaled in a bracket 81, which is secured to the under side of the frame l of the machine. At the rear of the machine said rock-shaft carries fixed thereon an upwardly-extending pawl-carryiug arm t, upon the end of which is pivoted a spring-actuated pawl 33, the tooth of which is by said spring constantly pressed into engagement with ratchet-teeth 82, formed on the periphery of a cam-wheel w. Said wheel w is pivoted on a stud 83, extending from a bracket 84, secured on the rear of the bracket 81, and on the rear end of said stud is secured a spring 85, having arms carrying friction-shoes 86. This prevents the wheel w from going forward by its own momentum after the pawl has ceased to act. The amount of pressure from said friction-shoes may be varied by adjusting the position of the spring on the screw. The rocking of the shaft 36, communicated through the link 35 from the rocking of the lever n, will thus impart a rotarymovement in a uniform direction to the cam wheel. Said cam-wheel has a cam-groove 88, having two high dwells and two low dwells, connected by ascending inclines 89 and descending inclines 90, and in said groove rides a roller 67 on the end of an arm 68 of a bell-cranklever 8, mounted on a shaft 69, having a bearing in the lower portion of the bracket 8l. Thus by the rocking of the lever nsaid lever 8 is rocked in toward the center of the camwheel twice in each revolution of said wheel.

By mechanism hereinafter described the rocking of the lever 8shifts the deviceswhich hold the button. Before, however, describing the remaining mechanism for this purpose it may be here observed that the adjustability of the end of the link 35 along the T-slot 79 permits a variation of the number of stitches to be made in each button. In

proportion as the end of the link 35 is secured near to or away from the pivotal center of the bell-crank n so will the amount of throw given to the pawnl 33 for each vibration of the bellcrank lever 'n be greater or less and likewise will be the distance through which the cam-wheel rotates for each such vibration, and thereby the number of stitches made before the cam-wheel travels through the distance from one to the other of the inclines 89 will be greater or less.

The T-slot 79 is marked at the proper positions with the number of stitches to he made in the button if the end of the link 35 is clamped in the proper positions.

In the usual construction of a cam in. which a roller descends from a high to a low dwell as the cam-wheel revolves such complete descent occupies an appreciable fraction of the whole time ot' revolution of the cam-wheel. Thus if the arc through which the pawl rotates the oam-wheelin making one stitch is less than the arc through which the camwheel has to move to transfer the roller from the high dwell to the low dwell then the needle will reciprocate before the transference has been completely eiected, and the needle will strike the button. To avoid this result, there is provided the following construction: Upon the wall of the cam-wheel, at the corner of each descending incline 90, which inclines are preferably made sharp, is secured a block 4S, having a sharp corner 91, and the arm 68 has a sharp or square point. 49 on the inner side of its end. The engagement of the pointed end 49 with the block 48 will hold the roller 67 to the high dwell until such a point has been reached in the revolution of the wheel that said roller can drop instantaneously to the low dwell, and when the said pointed end 49 has passed the sharp corner 91 of said block 48 the roller will so drop instantaneously, being actuated by a spring 50, secured between the bed of the machine, and an arm 92, secured on the shaft 69. This will insure an instantaneous shift of the button-holding device from one of its operative positions to the other before the needle has time to make the next reciprocation.

Coming next to the consideration of the remainder of the mechanism by means of which the button is shifted, the crank-lever 8 carries an arm 37, connected by a short link 38 to a crank 39 in a shaft 40, having a bearing in the bracket 81 and extendingfrom the rear to the front of the machine. The front end of said shaft 40 carries-an arm 4l,having a T-slot 93, formed in an arc of a circle having as radius a link 43, and in said T-slot 93 the end 94 of said, link 43 is connected, being adjustable longitudinally therein, said adjustment being regulated simultaneously with the adjustment of the link p in the T- slot 77, and for this purpose the ends of the links p and 43 are connected by a link which is equal in length to the distance between the pivotal centers of the bell-crank lever n and the arm 41, and thus the links p and 43 have always the same eXtent of vibration. Said link 43 is connected to au arm 44 on a shaft 45,eXtending through an aperture in the lever 8 and from front to rear of the machine and having its bearings in the bracket 8l, the rear end of said shaft 45 carrying a downwardlyextending arm 136. Thus the rocking of the arm 68 of the bell-crank lever 8 inward from a high to a low dwell rocks the end of the arm 136 to the right, or away from the needlebar. Said arm 136 has a knob-like end 96, which engages a recess 97in a plate 11, reciprocating between gibs 118, screwed to the frame of the machine, which plate 11 carries upon it the clamp-box 17,con taining the arms 18 19 of the button-holding jaws 20, so that the rocking of the arm 136 will present to the needle the second pair of eyes ofthe button.

Since the ends of the links p and 43 are connected by the link 42, a movement of the link p along the Tslot to adjust the amount of shift of the needle-barwill likewise cause the end of the link 43 to move along its T-slot an equal distance to or from the shaft 40 and so increase or decrease proportionately the shift of the button-holding jaws, and as the same amount of shift is necessary in both cases this double adjustment is performed by a single operation.

The mechanism for automatically stopping the machine when a predetermined number of stitches have been made will now be described.

The cam-wheel w has secured on its rear face two pins 32,diametrically opposite to each other, and in the revolution of the wheel each of the pins will in turn engageaspring-pressed arm 31 of a bellcrank lever, the other arm 30 of which normally rests against a pin 98, extending laterally from a rod @,slidinglongitudinally of the machine in guides 99. Said pin 98 is normally pressed against the end of said arm 30 by means of a spring 100, which pulls upward an arm a of a bell-crank lever b, pivoted on the frame of the machine,said bellcrank lever having also an arm c,with a forked end, engaging said pin 98. When one of the pins 32 raises the arm 31, the arm 30 is moved away from the pin 98, and the spring 100 moves forwardly the rod c, thereby bringing a friction-diskfagainst the tight pulley g and shifting the belt 101 from said tight pulley to the loose pulley 102, thus stopping the machine. `When the machine is to be started again, the operator depresses the arm a, and thereby1 draws back the rod e, moving the friction-diskfaway from the tight pulley g and shifting Ythe belt 101 onto said pulley g. At the same time the arm 30 is moved ,by its spring in front of the pin 98, being arrested there by a stop 103 and remaining there until pushed aside by the other pin 32 of the camwheel. Also at the same time the cam-wheel is given a rotary movement through a considerable arc, the object of which and the means for accomplishing which are as follows: Immediately before the machine is stopped the roller 67 is on the low dwell. It is therefore necessary to bring it to the high dwell again for the first part of the operation of sewing on the next button-that is, the button-clamping jaws must be shifted back to their first position; but this must be done before the stitching commences or the needle will strike the button. There is therefore provided a spring-actuated -pawl 51, working on a rocking arm 104, which pawl when the machine was stopped was moved rearward through a considerable arc over the ratchetteeth 82 by means ot' a downwardly-extending arm 105 of the bell-crank lever b, engaging by its forked end a pin 106 in said arm 104, and on the starting of the machine 'this pawl 51 will now be moved forward and will instantaneously move the cam-wheel w a sufiicient distance to carry the roller from the low dwell to the high dwell, and will thus, through the intermediate mechanism, the arm 68, arm 37, link 38, crank 39, shaft 40, arm 41, link 43, crank 44, shaft 45, and arm 136, move transversely across the path of the needle the clamp-box plate l1, between the gibs 118, screwed to the frame of the machine. The

clam p-plate 11 is provided with lugs 1102u 1101],

between which is hinged one end of a clampbox 17, which is held down to the clamp-plate 11 by the pressure of the adjustable spring 27.

The mechanism for holding the hu tton will now be described.

The machine having stopped automatically in the manner just described, the operator will now by any suitable foot or knee device depress an arm of a lever 2l, pivoted in a bracket 107, depending from the bed, and will thereby also, through a connection 108, actuate a bell-crank 22 to strike between and relieve the pressure of the jaws of the tension device. The depression of the arm of thele ver 21 will rock the shaft 109 of said lever, and thus will actuate a cam 23 on said shaft to rock a lever 52, also pivoted in said bracket 107, the other arm of which passes upward through an opening in said bed and through a slot in plate 11, and said arm will thus abut against the under surface of the box 17, pivoted at 110 on said plate 11, and will raise said box, and with it the clamping-jaws 20. I|nmediately after the box 17 is raised an armV 111 of the lever 2l will rocka horizontal arm 112 of a spring-resisted lever 113, pivoted at 114. on the cover of the box 17, and will thus, by means of an arm 25 of said lever, having a forked end engaging a pin 57, move said pin rearwardly. rlhe pin 57 isguidedin its rearward movement by a guide-block 58, in which it is secured, sliding ina channel 59 undercut in the cover, and below said block said pin carries-one beneath the other-two rollers 55 56, of which the upper-one, 55, rollsin a slot 53, cutin the upper clamp-slide 18, and the lower one in a slot 54 in the lower clamp-slide 19. The upper slot 53 extends obliquely to the left rearwardly, so that when the pin 57, with IIO its roller 55, is moved rearwardly the engagement of said roller 55 with the slot 53 will move the upper slide 18 to the right, and in like manner as the lower slot 54 extends to the right rearwardly the lower slide will be moved to the left. The lower and upper slides carry jaws 20, engaging the button on the left and right, so that when the abovedescribed movement takes place the button is released from said jaws. In addition to these jaws there is a third jaw 61, adapted to support the button on the rear, the construction and operation of which are as follows:

The cover 1l7is secured by screws to the top of the box and has an extension 119, which has cut in its under surface at its end a transverse channel. In said channel moves the slide 62, being supported therein by a screw 120 passing upward therefrom through a slot 122 in the extension parallel with the channel, the head of said screw resting on the extension. The slide 62 carries the jaw 61 at its front end and is moved into position to hold the button by a cam-arm 64, secured to the upper slide 18 and moved to the left therewith. When said arm is so moved to theleft, the cam end thereof engages a roller 63, mounted on the under side of the slide 62 and moves said slide forward. A spring 126, suitably secured between the extension and the slide, serves to withdraw said jaw when the arm 64 moves to the right.

The end of the cam-arm 64 is inclined to said arm at an angle of forty-five degrees. Therefore the amount of movement given to the jaw 61 is always equal to that of the jaw carried by the upper slide, and inasmuch as the slots 53 54 have the same Obliquity as each other to the direction of motion of the pin 57 the movements of the two slides 18 19 are always equal. Hence there are provided three button-holding jaws which must always move uniformly away from a common center and will therefore hold buttons of all diameters with uniform exactitude. When the operator releases the pressure, springs 27 28 serve to restore the parts to their former position, in which the jaws 2O and 61 clamp and support the button.

`To adjust the machine for sewing buttons with two holes or with a bar, the screw 46, which connects the arm 37 to the link 38, is withdrawn, and said link is turned around and is fixed by the screw 130 passing through said link end and being screwed into a threaded hole 47 in the bracket 81, as shown in Fig. 9. In this position the crank 39 has been shifted to a position exactly half-way between the two positions it occupies in stitching the first and second pair of eyes of the button, so that the button holding jaws are likewise shifted into such central position, and the stitches are made along a diameter of the button. 'Although when so adjusted the mechanism for shifting the button is thrown out of position, the mechanism for automatically stopping the machine will still be operative,

and the number of stitches to be made before such stoppage takes place may still be varied at pleasure, as before, by shifting the end of the link 35 along the T-slot 79.

The button-holding jaws 2O are made rigid and divergent or V-shaped in vertical section. They will thus hold eiectually buttons of various thicknesses. I do not, however, claim in the present application the construction of the button-clamp including the construction of said jaws, as this forms the subject of a separate application, filed January 15, 1900, Serial No. 1,529.

I claim- 1. In a sewing-machine the combination of a drivingshaft, a needle-bar reciprocated thereby, means for changing the lateral position of the material relative to the needlebar comprising a cam-wheel driven from said shaft and having a cam-surface, a block with a sharp corner near the descending incline, a roller-arm having a pointed projecting end, theroller rolling on the surface and the end of the arm engaging the block to maintain the roller wholly to one dwell until it has passed the incline a suicient distance to move to the other dwell; and means for shifting said roller to the other dwell when permitted to move thereto, substantially as described.

2. In a sewing-machine, the combination of the main driving-shaft, the needle-bar reciprocated thereby, means for changing the lateral position of the material relative to the needle-bar comprising a cam-wheel driven from said shaft and having a ca1n-surface, an arm carrying a roller on said surface, coengaging devices carried respectively by said wheel and arm which hold the roller wholly to one dwell until it has passed the incline a sufficient distance to move to the other dwell, and means for causing it to move in the length of time elapsing between an ascent of the needle out of the material and the next descent thereof, substantially as described.

3. In a button-sewing machine, the combination of a button-clamp, a main drivingshaft, a needle bar reciprocated thereby` means for changing the lateral position of the button-clamp relative to the needle-bar comprising a cam-wheel driven from said shaft and having a cam-surface, an arm carrying a roller on said surface, coengaging devices carried respectively by said wheel and arm which hold the roller wholly to one dwell until it has passed the incline a sufficient distance to move to the other dwell, and means for causing it to so move in the length of time elapsing between an ascent of the needle out of the button-eye and the next descent thereof "thereinto, substantially as described.

4. A button-sewing machine having a button-clamp, adjustable mechanism for shifting said clamp, adjustable mechanism for shifting the needle-bar carrier, and a link connecting said mechanisms whereby the IIO transverse and longitudinal movements of the needle-bar carrier and button-clamp, respectively, are always the same, substantially as described.

5. A button-sewing machine having adjustable mechanism for shifting t-he needle and adjustable mechanism forshifting the button, an operative connection between the adjusting devices whereby both are sim ulianeously adjusted, and means for clamping the adjusting` device of one of said mechanisms, substantially as described.

6. In a button-sewing machine, the combination of a rock-shaft, driven from the main driving-shaft, a rocking arm thereon, a needie-bar carrier, a link connecting said carrier with said arm and movable along said arm, a button-clamp, a train of mechanism operati vely connecting said rock-shaft and buttonclamp and comprising a link and a rocking arm upon which the end of the link is movable, said rocking arm extending substanlially parallel with the first arm, and a link connecting the ends of the aforesaid links in their respective arms, whereby the adjustment of one simultaneously adjusts equally the other, substantially as described.

7. In a button-sewing machine, the combination of a needle-bar carrier, a rock-shaft operatively connected therewith to shift the same horizontally aftera predetermined number of stitches, and driven from the main driving-shaft, a button-clamp mechanism, a cam-wheel driven in a uniform direction from said shaft step by step synchronously with lthe rocking thereof, an arm connected with said button-clamp mechanism to shift the same,said shiftingmovement beingcontrolled by said cam, and means whereby the extent of shift of the needle-bar carrier and that of the button-clamp mechanism are simultaneously varied, substantially as described.

S. In a sewing-machine, the combination of a clamping mechanism for the article to be operated upon, a cam-wheel, a roller in the cam-groove thereof, an arm carrying said roller and operated thereby to shift the clamp mechanism, a stopping device brought into operation by the cam-wheel in its revolution, and means actuated, before the further reciprocat-icn of the needle on restarting the machine, to advance said cam-wheel a sufficient distance to restore the roller to the original dwell, substantially as described.

9. In a button-sewing machine, the combination of a needle-bar carrier, a rock-shaft operatively connected therewith to shift the same horizontallyafterapredetermined number of stitches, and driven from the main driving-shaft, a button-clamp mechanism, a camwheel driven in a uniform direction from said shaft step by step synchronously with the rocking thereof, an arm connected with said button-clamp mechanism to shift the same, said shifting movement being controlled by said cam, and means for independently advancing said cam-Wheel to return said arm 1o its original position, substantially as described.

10. In a sewing-machine, the combination with a stitch-forming mechanism including a vertically-reciprocating and laterally-vibratinfnT needle, of a button-clamp conlined to reciprocate in a single rectilinear path at a right angle to the vibratory path of the needle, means for actuating said clamp, and the mechanism for imparting the vibratory movement to the needle including a means for holding the needle at each end of its vibratory path during two com plete reciprocations thereof, substantially as described.

ll. In a button-sewing machine, the combination of a button-clamp, a main drivingshaft for reciprocating the needle, a cam driven thereby making a complete revolution in four complete revolutions of the driving-shaft, and a needle-bar carrier vibrated by said cam, said cam having two inclines and two concentric dwells, each dwell being sufficiently longr to hold the needle-bar carrier stationary during two successive complete in-and-out movements of the needle through an eye of a button held in said clamp, substantially as described.

l2. In a button-sewing machine, the combination of a button-clamp, a main drivingshaft for reciprocating the needle, a cam driven thereby making a complete revolution in a plurality of complete revolutions of the driving-shaft, and a needle-bar. carrier vibrated by said cam, said cam having a plurality of inclines and a plurality of concentric dwells, each dwell being sufficiently long to hold the needle-bar carrier stationary during two successive com pletein-and-out movements of the needle through the eye of the button held in said clamp, substantially as described.

13. In a button-sewing machine, the combination of a button-clamp, a main drivingshaft for reciprocating the needle, and mechanism for imparting one complete vibration to the needle-bar carrier during four complete revolutions of the driving-shaft, said mechanism comprising means for holding the needle-bar carrier stationary during two successive complete in-and-out movements of the needle through an eye of a button held in said clamp, at each terminal position of vibration, substantially as described.

14. In a button-sewing machine, the combination of a needle-bar carrier, a rotary shaft for imparting vertical reciprocations to the needle-bar, a rock-shaft driven from said rotary shaft and making one complete vibration to every four revolutions of said shaft, said rock-shaft being operatively connected with said carrier to vibrate the latter, a cam- Wheel driven step by step from the rocking of said rock-shaft, and a clamp mechanism shifted transversely of the vibration of the carrier by said cam-wheel, substantially as described.

l5. In a button-sewing machine, the comlOO IIO

bination of a rock-shaft having transverse longitudinal bearings in the arm ofthe machine anddriven from the main driving-shaft, an arm on said rock-shaft, a link connected with said arm and operatively connected with the needle-bar carrier to impart thereto a to and fro movement, a Vertical camwheel mounted at the rear side of the machine on a horizontal transverse shaft, a paw]- carrying arm mounted on a horizontal transverse shaft in line with that in which the cam is mounted, and engaging the teeth in the cam-wheel to advance the same, a connection between said latter shaft and the rock- Shaft, whereby they rock synchronously, a vertical lever rocked by said cam-wheel, and a buttoirclamp reciprocated by the vibration of said lever, substantially as described.

16; In a button-sewing machine, the combination of a clamp mechanism, a rock-shaft 45 extending from front to rear of the machine in a horizontal bearing, an arm, on the rear end of said rock-shaft and operatively connected with said clamp mechanism to reciprocate the same, an arm on the front end of said shaft, a second rock-shaft extending from front to rear of the machine in a horizontal l'iearing, an arm on the front end of said second shaft, a link adjustably connecting said arms' on the front ends of said shafts, an arm on the rearend of said second shaft, a vertical cam-wheel on the rear side of the' machine operatively connected with the main driving-shaft, and a lever operated by said cam-wheel at a predetermined point in its revolution and operatively connected with said last-named arm to vibrate the same, substantially as described.

17. In a button-sewing machine, the combination of horizontal rock-shafts 0 36 extending from front to rear of the machine the shafto being driven from the main drivingshaft, arms on the front ends of said shafts, a link adjustably connecting said arms, whereby the shaft 36 is driven by the shaft 0, a feed mechanism operated from the rear end of the shaft 36, a third horizontal rock-shaft 40 extending from front to rear of the machine, an arm on the rear end of the shaft 10 operated at a predetermined point by said feed mechanism, an arm on the front end of the shaft 40, a fourth horizontal rock-shaft, au arm on the front end thereof, a link adjustably connecting the last-na med two arms, a clamp mechanism, and an operative connection from said last-named shaft to said clamp mechanism to reciprocate the latter, substantially as described.

In witness whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

FRANCIS T. LEILICI'I.

Witnesses:

FRANCIS M. WRIGHT, ZUA A. DANIELS. 

